Algebra 1 · Linear Functions
Rate of Change
Algebra 1 · Linear Functions
Definition
Rate of change is how one quantity changes relative to another; for a line it equals the slope.
Examples
- A cost rising $3 per item has rate of change 3.
- Distance of 60 miles per hour is a rate of change.
Key rule
For a straight line the rate of change is constant.
Memory hook
Rate of change = how fast y moves per unit of x.